Spare-wheel lock



Aug. 27, 1929. G. E. PARKER SPARE WHEEL LOCK Filed sept. 11, 192e .Patented Aug. A27, 1929.` .i

, a UNITED STATES PATENT OFFICE.

GUY E. PARKER, OF- DETROIT, MICHIGANMASSIGN OR TO GENERAL MOTORS OORIORA- TION, 0F DETROI', MICHIGAN, A CORPORATION OF DELAWARE.

SPARE-WHEEL Loox.

d Application led September 11, 1926. Serial No. 134,887.

In the drawing:

Figure 1 is a vertical sectional'view of an automobile wheel of the disk type mounted upon a spare wheel carrier with the present invention vapplied thereto. l

Figure 2 is an enlarged section of the lock-` ing mechanism. v

Figure 3 is a fragmentary vertical sectional view showing the embodiment of the invention in a carrier for two spare wheels. Figure 4 is a detail perspective view of two elements of the lock.

the end of `the lock housing.

Referring to the drawing, a common .form of spare wheel carrier is shown, as consisting of attachment brackets 1, bolted to a circular mounting plate or disc 2. -Around the Voutside of the plate 2 is a series of attachment studs 3, with nuts 4 screw threaded thereon, fon detachably fastening or mounting a disc wheel 5.

At the center or hub of the mounting plate 2, there is provided a screw threaded projection or boss 6, which in this instance consists' of the head of a stud extending thru 4a central hole in the plate and secured in place by the nut 7. The stem 8 f the stud may be serrated or knurled to resist rotation of `the head and Aits end is preferably riveted or peened over the nut 7 to prevent unthreading of the nut. Carried by the boss 6 1s a circular hollow head or barrel 9, preferably formed with handles or grips 10 to facilitate rotation for threading of the head upon the boss. Seated in an annular groove or depression on the exterior ofthe head 6, is a split ring 11 for retaining thereon a collar 'or washer 12, forming a seat for the compression spring 13, which bears upon and maintains the hood or domed cap 14 against the peripheral shoulder 15. -When the head 9 is adjusted upon the boss 6, the hood 14 Figure 5 is 'a detail perspective view of surrounds and completely encloses or covers the circular series of attachment studs 3, preventing access thereto for vremoval of the wheel. j

In order to prevent unauthorized detachment of the cover for the bolts, comprising the hood 14 and head 9, the interior of the hollow head is provided with two diametrically opposite semi-circular grooves or recesses .16, forming akey-wayffor a bifurcated detent or plunger 17, which is adapted to slide in said key-way into engagement.

with a radial groove or r cess 18- in the face portion of thereduced oss end. In the front end of the 'hollow head 9 is located a tumbler lock 19, controlling the rotation of a cam head 20, which extends between the bifurcated ends or forks of the detent or plunger 17. Carried on each fork is an inwardly disposed 4headedV pin 21 vmaintained 1n engagement upon'the cam surface by a small helical spring 22 disposed between the cam head 20 and detent 17 When the proper key is inserted in the tumbler lock 19 and given a quarter turn, the -cam head 20 is rotated and the pins 21 riding on the cam surface withdraw the detent 17 from the radial groove 18 t0 permit unthreading and removal ofthe cover from the mounting plate for access to the wheel fastening lugs. vUpon replacing the cover the cam is turned back a quarter revolution, and the spring 22 presses the plunger or `detent 17 into the radial groove 1'8, precluding further relative movement. y j

When two spare wheels are lto be carried, as shown in Figure 3, the first wheel 23 is secured tothe'mounting plate 2, with each stud 3, having screw threaded thereon the enlarged head 24 of an elongated pin 25. A spacer member 26 bolted to the plate 2, has

ya beveled or conical outer end on which theplate 27 rests, with the pins 25 extending thru the plate. Nuts 28 `screw threaded on the pins form the fastenings for thesecond wheel 29. Access to the attachment members is prevented in the same manner as before described, the' 'cover being carried upon`the end of the spacer 26.

Vhile the anti-theft cover has been described as applied to the spare Wheel carrier, it will be obvious that such cover may also be employed to enclose the attachment bolts when t-he wheel is mounted on the automobile axle for contact with the road. In

such ,event the head 9 would be threaded upon the end of the axle instead of the boss 6.

The arrangement. of parts has been described more or less specifically, but it is obvious that various modifications may be made as come within the scope of the appended claims.

I claim:

l. Means tovsecure a detachable cover over fastening attachments which hold a wheel on a mounting, including a screw threaded boss carried by the'mounting, a hollow hub forming a part of the cover and having screw threaded engagement with said boss, an axi# ally movable detent having sliding keyed engagement withiny said hub and adapted to be slid into or out of engagement withsaid boss to control the threading of said head on or off the boss.

2. Means to secure a detachable cover over fastening attachments which hold a wheel on a mounting, including a screw threaded boss, a head having screw threaded engagement on the boss and being provided with a key-way, and a key slidable in said way into and out of engagement with said boss.

, 3". Means to lock a detachable cover over fastening attachments which hold a wheel on a mounting, including an axially movable detent engageable with both the cover and the mounting to hold them against separation, and means to prevent unauthorized manipulation of the detent.

4. Means to secure'a detachable cover over fastening attachments which hold. a wheel on a mounting, including a member forming a part of the mounting to which the hub of said cover is attachable, a key actuated lock carried by the hub and having a cam head which is rotatable upon the insertion and rotation of the proper key in said lock, and a detent having a part engageable with said cam for movement thereof upon rotation of the cam, into or out of engagement with said mountingl member. n n

5. Means to securea detachable cover over fastening attachments which hold a wheel on a mounting, including a screw threaded boss, a head having screw threadedengagement on said boss, and being provided with a keyway, an' axially movable detent slidable in said keyway into and out of a groove in the face of said boss, vand means to lock the detent against unauthorized movement.

6. Means to secure adetachable cover over fastening attachments which hold a wheel on, a mounting, including -relatively rotatable members respectively forming a part of the mounting and cover respectively, and an axially movable element having sliding keyed engagement with one of said members and adapted to vbe slid into and out oft engagefastening attachments which hold a wheel on a mounting, including a screw threaded boss having a radially grooved face portion, a hollow hub removably screw threaded on said boss, and having a pair of diametrically opposite interior grooves, a plunger slidingly engaged in said last mentioned grooves and axially movable into and out of engagement with said grooved face portion.

9. The structure described in claim 8, and

and means to lock the plunger against unauthorized movement.

10. The structure described in claim 8, and

ymeans to lock the plunger against unauthorized movement, comprising a lock mounted in said hub, and having a cam element engageable with the plunger to slide the plunger upon proper operation of the lock.

1l. The structure described in claim 8, said plunger being bifurcated and having a` pair of inwardly disposed bosses carried one on each fork thereof, a lock element mounted in the hub and having a cam surface on which said bosses ride to slide the plunger upon proper operation of the lock, and a spring adapted to yieldingly maintain thel bosses on said cam surface.

In testimony whereof I affix my signature.

GUY. E. PARKER. 

